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Finding the Fourth Proportional to 1,563.44, 2,157.48 and 891.36

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Solution

The fourth proportional to 1,563.44, 2,157.48 and 891.36 is: 1,230.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.44 : 2,157.48 = 891.36 : x
  2. Step 2: Convert to fraction form
    1,563.44/2,157.48 = 891.36/x
  3. Step 3: Cross multiply
    1,563.44x = 2,157.48 × 891.36
  4. Step 4: Simplify right side
    1,563.44x = 1,923,091.37
  5. Step 5: Solve for x
    x = 1,923,091.37/1,563.44
  6. Step 6: Final answer
    x = 1,230.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.